Just a few miles west of Sweetwater (savory name, that) lay the RS&P, chartered in 1906 to build about 200 miles of line from Roscoe northwest through Bailey County. The first 31 miles (49.9 km) from Roscoe to Snyder was laid down quickly enough and the line opened in July 1908. The Ten-wheeler shown in this entry would have operated on this segment first.
Although it was a typical short line 4-6-0, its Baldwin spec sheet has two "Hereafter" notes that indicate how individual was each order. Should the RS&P order another Baldwin (it didn't), the builder was to "make the back cab window on side 8" longer and shorten the front side window to suit." (The shops might already have modified the 2 accordingly.) Also, "make valve rod guide of cast iron with brass bushing."
In September 1909, the next 18 1/2 miles (29.8 km) opened to Fluvanna.
Even though those 49 1/2 miles (79.7 km) would be all there ever was of the RS & P, it was, says Hunt's article in the Handbook of Texas, "one of the most profitable short lines in the nation" because of its strategic location as a bridge line.
By 1941, however, the Fluvanna extension was abandoned and taken up. Passenger service on the rest ended in 1953. The line itself closed in 1984.
Locobase 13174 shows the RS&P's saturated-boiler mixed-service Ten-wheeler that arrived from Baldwin in 1909. The 3 was a reworking of that design to take advantage of drier steam provided by a superheater. To make room for the 20 flues full of elements, the boiler sacrificed 119 small tubes and about 10% of combined heating surface area. Hotter steam meant adoption of 9 1/2" (241 mm) piston valves in place of the 2's slide valves.
A photo on the Denver Public Library's Digital Collections (http://digital.denverlibrary.org/cdm/singleitem/collection/p15330coll22/id/77161/rec/1329) shows a trim-looking #3 still at work for the RS&P in 1947.
|Specifications by Steve Llanso of Sweat House Media|
|Railroad||Roscoe, Snyder & Pacific||Roscoe, Snyder & Pacific|
|Number in Class||1||1|
|Builder||Burnham, Williams & Co||Baldwin|
|Locomotive Length and Weight|
|Ratio of driving wheelbase to overall engine wheebase||0.53||0.53|
|Overall Wheelbase (engine & tender)||51.96'||511.70'|
|Axle Loading (Maximum Weight per Axle)|
|Weight on Drivers||97000 lbs||98000 lbs|
|Engine Weight||122000 lbs||126000 lbs|
|Tender Light Weight||100000 lbs||100000 lbs|
|Total Engine and Tender Weight||222000 lbs||226000 lbs|
|Tender Water Capacity||5000 gals||5000 gals|
|Tender Fuel Capacity (oil/coal)||10 tons||10 tons|
|Minimum weight of rail (calculated)||54 lb/yard||54 lb/yard|
|Geometry Relating to Tractive Effort|
|Boiler Pressure||190 psi||190 psi|
|Cylinders (dia x stroke)||18" x 24"||18" x 24"|
|Tractive Effort||21652 lbs||22032 lbs|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||4.48||4.45|
|Firebox Area||145 sq. ft||108 sq. ft|
|Grate Area||22.20 sq. ft||22.30 sq. ft|
|Evaporative Heating Surface||1796 sq. ft||1335 sq. ft|
|Superheating Surface||299 sq. ft|
|Combined Heating Surface||1796 sq. ft||1634 sq. ft|
|Evaporative Heating Surface/Cylinder Volume||254.08||188.86|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||4218||4237|
|Same as above plus superheater percentage||4218||5000|
|Same as above but substitute firebox area for grate area||27550||24214|